Need to disable caching of RSS/Atom results

We use an RSS/Atom panel to display Internal announcements on an internal dashboard. Unfortunately the texts which are displayed are being cached for a very long time and when the RSS feed is updated the announcements may not appear for many hours.
Is there a way to disabling this result caching?
The rest of the dashboard displays realtime graphs which update every few minutes, so having no cache at all would not be an issue - if theres a way to completely disable caching.

Any pointers at all would be helpful. I’ve been reading articles on the grafana site but most don’t seem to apply and aren’t very clear as to what component is actually doing the caching of what data, nor what setting controls the cache time, so I’m scratching my head trying to work out what I need to be looking at.